Machine for making cores or molds.



PATENTED MAY 23, 1905.

s SHBBTSSHBBT 1,.

J. E. BURKILL 6L W. SUNDERLAND. MACHINE POR MAKING GORES 0R MOLDS.

APPLICATION FILED SEPT. 1s, 1903.

W; wwwwm No. 790,781. PATENTBD MAY2s,1905.

' J. E. BURKILL L W. SUNDBRLAND.

MAUHINB POR. MAKING Goms 0R MOLDS.

APPLIGATON FILED SEPT. 16, 1903.

3 SHEETS-SHEET 2,

PATE-NTED MAY 23, 1905.

J. E. BURKILL L WI SUNDEBLAND.

MACHINE FOR MAKING CORES 0R MOLDS.

APPLICATION FILED SEPT. 1e, 1903.

3 SHEETS-SHEET 3.

UNITED STATES Patented May 23, 1905.

PATENT OEETCE.

JESSE EMMERSON BURKILL AND WALLACE SUNDERLAND, OF MORLEY,

ENGLAND. f

MACHINE FOR MAKING CORES OR NIOLDS.

SPECIFICATION forming part of Letters Patent No. 790,781, dated May 23, 1905.

Application filed September 16, 1903. Serial No. 173,422.

T LZZ whom, t Wray concern:

Be it known that we, JEssE EMMERsoN BURKILL and VALLACE SUNDERLAND, subjects of the King of Great Britain and Ireland, whose postal address is The Yorkshire Engineering and Fuel Economiser Works, Bridge Street, Morley, in the county of York, England, have invented certain new and useful improvements entitled A Machine for Making Cores or Molds, (for which application for a patent has been made in Great Britain, numbered 577, dated January 9, 1903,) of which the following is a specification.

Our invention relates to a machine for making cores or molds, and has for its object the construction of a machine for pressing cores or patterns by compressed air or hydraulic power in which the exhaust is used for drawing or turning out the core. The machine mayalso be used as a molding-machine.

In describing our invention in detail reference is made to the accompanying sheets of drawings, similar letters indicating similar parts, in which- Figure l is a front elevation of our improved machine. Fig. 2 is a sectional elevation through line c t of Fig. 1. Fig. 3 is a sectional elevation through line c d of Fig. l. Fig. 4 is a side elevation. Fig. 5 is a sectional elevation of our machine as used as a molding-machine.

In carrying out our invention the admission of the water or air to operate the ram A .may be controlled by a suitable three-way cock or valve or valves B. The air or like cylinder C, in which said ram A works, and bed-plate D may be made in one piece. The working stroke of the ram A is preferably upward, the sand or the like being filled into the recess E around the die F, which is removable, but can be firmly attached to the ram A by means of a bolt, as shown. On the completion of the upward stroke of the ram A the catch or like M, attached in any convenient manner to the outer portion of the ram A, engages with the adjustable nut or like N, which is attached to lever O and raises the weighted lever l?, thereby opening the valve R. Suitable movement of' the valve B closes the admission-port and permits communication between the chamber C, the exhaust-pipe G, and the flexible pipe G This allows a certain quantity of air or the like to escape back through the pipe B and through the pipe G and out through the escape-valve R, thus allowing the ram A to fall by reason of the weight of such ram overcoming the pressure in chamber C. The valve R is then automatically closed by the action of the weighted lever P, and the remaining air or the like is forced by the descending ram through pipe B and pipe G, thence through flexible pipe G to the annular space H, provided underneath the ringtube or cylinder J, which forms an air-piston supporting the bottom of the core or cake. The air or like passing to the before-mentioned annular space H raises the air-piston J until the finished core or the like is pushed or blown level with the top K of the mainA piston or cylinder, when the said core may be removed.

This machine is especially applicable for making cores for castings of all kinds of pipes and round articles.

To use our machine as a molding-machine, l

the construction is as shown in "section in Fig. 5. There is one cylinder C and bedplate D, which may be made in one piece, as before. The ram A2 is attached to what might be termed the bottom plate A'of the molding-box, in which are the patterns S, supported on the upper part of said ram, the sand being filled in in the ordinary way. The action of this ram is identically the same as before described. Instead of there being one cylinder J there are two such cylinders J', actuated, as in the case of the core-machine, by means of flexible or like pipes attached to the exhaust-pipe G. 0n the compressed air or the like acting on the ram A the sand is compressed against the top plate U. On the ram descending the exhaust-air or the like pressure acts on the rams in cylinders J J and lifts the molding-box clear of the patterns. The molding-box can then be removed as required. lA stop T, working in groove V, is provided, as shown in Fig. 5, in order to prevent the ram AZ from being blown out. Similar stops are also provided on the smaller cylinders J.

What we claim as our invention isl l. The combination of a frame, a cylinder, a ram, a mold carried by one of the members comprised by the cylinder and ram, a piston and cylinder for ejecting a body from said mold, with means 'for directing fluid into said second cylinder after it has been used in the first cylinder, substantially as described.

2. The combination of a frame, a cylinder, a ram, a mold carried by one of the members comprised by the cylinder and ram, a die in said mold, means including a hand-operated device for controlling the flow of motive fluid to said cylinder, a second cylinder, a piston therefor placed to eject bodies from the mold, and automatic means independent of said hand-operated means for causing said second cylinder to be supplied with motive fluid, substantially as described.

3. The combination of a frame, a cylinder, a ram, a mold carried by one of the members comprised by the cylinder and ram, an auxiliary piston, a cylinder therefor, a die in the mold, said die being removable independ-` upon said annular piston, substantially as described.

5. The combination of a frame, a cylinder, a ram, a mold carried by one of the members comprised by the cylinder and ram, a piston for ejecting a body from said mold, a cylinder therefor, and a valve having connection whereby the first cylinder may be supplied with motive fluid, or the first cylinder connected with the second cylinder at will, substantially as described.

6. The, combination of a frame, a cylinder, a ram, a mold carried by one of said members, an auxiliary cylinder, a ram therefor placed to eject bodies from the mold, a main valve having connections to both of said cylinders and to the source of supply for motive fluid, with an auxiliary valve connected to theauxiliary cylinder, and means for automatically operating said auxiliary valve, substantially as described.

7. The combination of a frame, a cylinder, a ram, a mold carried by one of said members, an auxiliary cylinder, a ram therefor placed to eject bodies from the mold, a main valve having connections to both of said cylinders and to the source of supply for motive fluid, with an auxiliary valve in connection to the auxiliary cylinder, means for normally lretaining said auxiliary valve in a closed position, and an arm carried by the mold-supporting structure for opening said auxiliary valve, substantially as described.-

In witness whereof we have hereunto set our hands in the presence of two witnesses.

JESSE EMMERSON BUR-KILL. WALLACE SUN DERLAND.

Witnesses:

HARRY J. RUsHFoRTi-I, JOSEPH 'P. KIRBY. 

